Gearing.



B. BARNES.

(12111111111. APPLICATION FILED MAY 9, 1911.

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BEARING.

APPLICATION FILED MAY 9, 1011.

1,004,525. Patented Sept. 26,1911.

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705%w6686 R an/Z02 2 2% je y'aznawmvaes COLUMBIA PLANOGIAPH CO"WMHINGTON, D. C.

- UNITED STATES PATENT OFFICE.

BENJAMIN BARNES, OF ASTON, SOUTH MELBOURNE, VICTORIA, AUSTRALIA.

GEARING.

To all whom it may concern:

Be it known that I, BENJAMIN BARNES, a subject of the King of GreatBritain, residing at Aston, Queens Road, South Melbourne, in the Stateof Victoria, Australia, have invented Improved Speed-Reducing Gearingfor Marine Steam-Turbines, of which the following is a specification.

This invention has been devised in order to provide means whereby twoshafts, one driving, and the other driven, may be con- J pled up in sucha way that each may run at its proper speed with the least loss of powerin the transmission, and it is intended for ships engined withsteamturbines, wherein the velocities of the'turbine and the propel- Y lerare incompatible.

According to this invention the turbine (driving) shaft is provided witha friction boss against which three equi-distant friction wheels ofconsiderably larger diameter are adapted to bear. Each friction wheel ismounted in an adjustable'bea-ring capable of being forced in thedirection of the turbine shaft by means of steam pressure operating uponpistons working in short radially disposed cylinders or upon flexiblediaphragms to either of which steam from the boiler is admitted for thepurpose. Each friction wheel is fixed to a shaft which is adapted todrive the propeller (driven) shaft through the medium of suitablenoiseless reducing gearing preferably helical gearing.

The invention is illustrated by the accompanying drawings whereof Figure1 is an end elevation partly in section and with the central portion ofthe end bearing bracket broken away. Fig. 2 is a side elevation(broken). Figs. 3 and 4 are details of the diaphragm which may beemployed in lieu of the piston.

' Referring to these drawings, 1 designates the driving shaft of amarine steam turbine journaled in bearings 2, and 3, and provided with afriction boss 4. Around this driving shaft at equi-distance from itsaxis and from each other are three shafts 5, 6, and 7 journaledrespectively in adjustable bearings 8, 9, and 10, at one end and attheir other ends in fixed bearings 11, and upon the respective shaftsare fixed the comparatively large friction wheels 14, 15, and 16,adjacent to the adjustable bearings. The shafts 5, 6, and 7, areprovided with pinions 18, all gearing with atoothed wheel 19, on thepropeller or Specification of Letters Patent.

Application filed May 9, 1911.

Patented Sept. 26, 1911.

Serial No. 626,078.

driven shaft 20, which is journaled in bearings 21, and 22, and arrangedin axial line with the driving shaft 1.

This reducing gearing is preferably but not necessarily of the helicaltype such for instance as illustrated.

The adjustable bearings 8, 9, and 10, of the driving shaft are mountedin radially disposed guideways 23, provided in similarly arranged arms24, on the end bearing bracket 25, while the bearings are provided withguide flanges 12, engaging the sides of said arms. The bearings may beacted upon by springs 26, seated in sockets 27, formed in the arms 24.,which springs will free the friction wheels 14, 15, and 16, fromengagement with the central friction boss 1, when the steam pressure iscut off, as for instance in the event of its being necessary todisconnect the propeller from the driving shaft.

The bearings are adapted to be forced in the direction of the drivingshaft along the guideways by means of steam pressure which operatesuniformly against pistons 28, or flexible diaphragms 29, in contact withsaid bearings.

Fig. 1 illustrates the piston arrangement, wherein each piston ismounted in a cylinder 30, with its end or stem 31, protruding andbearing against the bearing of the shaft, while steam is delivered intothe cylinders against the pistons through pipes 31, 32, and connectedwith a supply pipe 34;, leading from the boiler.

In the case of the flexible diaphragm 29, as illustrated in Figs. 3, and1, it is preferably of thin steel and forms the bottom of the steamchamber 37, and is provided with a stem or stud 38, which bears againstthe bearing of the driving shaft. The steam is delivered into thechamber through a pipe, and forces the diaphragm toward the drivingshaft, thus operating by means of its stem or stud 38, against theadjustable hearing.

It will be observed that on account of the pinions being geared to thetoothed wheel at equal distances apart they will drive the latterwithout any side pressure on the central bearing, while furthermore byreason of the pistons or diaphragms being of equal area and receivingsteam pressure simulta neously through a common supply pipe theequi-distant friction wheels are uniformly brought into contact with thefriction boss so that the shaft receives an equilibrium of pressure. Itwill also be noticed that no steam is consumed by the means employed foroperating the adjustable bearings as merely its pressure is utilized,and the steam does not escape.

WVith this gearing, power can be transmitted and the speed of a turbineshaft very considerably reduced, the reduction being determined by theratio of gearing employed. As an extreme example, a speed of 2,000revolutions of the turbine shaft may be reduced to 100 revolutions ofthe propeller shaft by making the pinions and wheel of the reducinggearing of a ratio of 4 to 1, and the boss of the turbine shaft and thefriction wheels 5 to 1.

Having now fully described and ascertained my said invention and themanner in which it is to be performed I declare that what I claim is:

1. Improved speed reducing gearing for marine steam turbine engines,comprising a driving shaft provided with a friction boss, threecomparatively large equi-distant friction wheels adapted to be broughtin contact with said boss by means of steam pressure, a driven shaft,and reducing gearing for transmitting the power from said frictionwheels to the driven shaft.

2. Improved speed reducing gearing for marine steam turbine engines,comprising a driving shaft provided with a friction boss, three shaftsarranged at equidistance around said driving shaft and from each otherand mounted at one end in fixed bearings and at the other end inradially adjustable bearings uniformly controlled by steam pressure, adriven shaft, a toothed wheel on the driven shaft, comparatively largefriction wheels on said shafts adjacent to said adjustable bearings andreducing pinions at the other ends of said shafts gearing with thetoothed wheel on the driven shaft.

3. Improved speed reducing gearing for marine steam turbine engines,comprising a driving shaft provided with a friction boss, threeequi-distant shafts around said driving shaft mounted at one end infixed bear ings and at the other end in radially adjust able bearings,steam pressure controlled pistons for operating said adjustablebearings, comparatively large friction wheels on said shafts adapted tobe brought into contact with said boss, a driven shaft, and reducinggearing for transmitting the power from said friction wheels to thedriven shaft, and arranged in axial line with the driving shaft.

4. Improved speed reducing gearing for marine steam turbine engines,comprising a driving shaft provided with a friction boss, a plurality ofshafts arranged at equi-distance around said driving shaft and from eachother and journaled at one end in fixed bearings and at the other end inadjustable bearings, a bracket formed with radially disi posed guidewaysin which said bearings are mounted, steam-pressure-controlled pistons incontact with said bearings, a driven shaft, a toothed Wheel on saiddriven shaft, comparatively large friction wheels on said shaftsadjacent said adjustable bearings, and reducing pinions at the otherends of said shafts gearing with the toothed wheel on the driven shaftand arranged in axial line with the driving shaft.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

BENJAMIN BARNE S.

IVitnesses EDWARD WVATERs, EDWARD N. WATERS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. C.

